Pressure drum



March 28, 1933. H. J. KERR ET AL 1,902,862

PRES SURE DRUM Filed Sept. 27, 1928 F i5 Z Fjg f BY '4; 'I, L/(IJZATTORNEYS Patented Mar. 28, 1933 UNITED sfrA'ras PATENT OFFICE,

HOWARD J. KERR, F WESTFIELD. AND GEORGE D. EBBE'IS, 01' KENILWOB'IH, muw

JERSEY, ASSTGNOBS TO THE BABCOCK & WILCOX JERSEY, A CORPORATION 0i NEWJERSEY ran-sauna 15mm Application and September 2?, 1m. Serial maaoaau.

' is not restricted to this particular use. It is especially adapted todrums and heads that are subjected to unequal temperature expansion atdifierent points and that must 'bekept tight.

The invention 'will be understood from the description in connectionwith the accompanying drawing in which Fig. 1 is a longitudinal sectionthrough one end of a drum showing an illustrative embodiment of theinvention; Fig. 2 is a section along the line 22 of Fig. 1. In thedrawing reference character 1 indicates a drum with an externallythreaded end upon which a threaded extension 2 is screwed or otherwisefastened so as to be securely attached to the drum to .make' a gas tightconnection.

. An annular weld 3 may be made at the inner end of the screw threadedextension when one is used; to prevent leakagefrom the screw threadedjoint even at high pressures. The extension 2 is provided with aninternal circumferential rib 4 which is,

ada ted to contact with the end of the drum 1 w en the extension 2 isput in place. The extension 2 which may be formed in. the metal of the'drum itself is also provided with an internal circumferential rib 5from which sections are cut away as shown in Fig. 2 evenly spaced aroundthe .circumference. The sides of this rib lie in a radial plane orapproximatel so, and preferably forma part of the ace of a square screwthread.

A somewhat disc-shaped head 6 to fit into the extension 2 is providedwith an inside rib 7 interrupted at intervals around its circumference,and matching the groove 8 behind-the rib 5 so that-the head 6 can be putin place in the manner common with 7 does not -fill the groove 8 behindthe rib provided with a removableoomm, or nazom. new 3 5, butthere isradial freedom for e ans ion,

as most clearly shown in Fig. 3. T e bear ing of rib 7 on rib 5 is onone side only, the side awa from the drum. By giving these bearing acesa helical or screw thread character the head is drawn toward the drum asit is rotated and the outer uninterru ted extension rib 5 but the rib 7is free to exand radiall or axiallyqin the "groove 8 bind the ri 5. Thehead 6 is preferably made concave on the inside. The joi'nt between therib or flange 9 and extension 2 at their flush faces is welded as shownat 10 to prevent leakage and the construction re vents stressing andinjury of the 'wel ing metal by internal pressure or expansion of themetal.

The head 6 can be removed by first removing the weld 10 and then turningthe head a slight distance circumferentially and then removing the samelongitudinally will have about the same temperature as the vapor. 4 Theouter circumference of the head and the end of the drum extension willbe cooler, but each will have about the same temperature as the otherand no relative expansion will take place to stressthe metal at the weldThis insures that the temperature expansion stresses willnot' break theweld and cause leakage, and. the weld is relieved of all internalpressure by the two interrupted ribs 5' and 7 which carry this head wheninoperative contact.

We claim:

1. The combination with a container having an opening of a closurearranged to fit within the wall of said opening, an outwardly extendingflange on said closure formed so as to lie flush with the surface of thecontainer around said opening, a metal weld closing the seam betweensaid flange and said surface and interlocking flanges on said rib 9 ofthe head is drawn toward the rum container and said closure for securingsaid closure in place.

2. The combination of a drum provided with an interrupted flange, a drumhead having an interrliiipted flange adapted to cooperate with the angeon said drum tohold said head in place, a second flange on said headextending outwardly from said body portion and formed so as to lie flushwith the outer end "of said drum, and a metal weld closing the seambetween said outer flange and said drum. p

3. In'combination, a container having an I innerv periphe'ry, ,and nearthe open. end

thereof a series of annually arranged radially extending spaced closureengaging members, a closure having similar annularly arranged peripheralmembers pass-.

ing through the spaces between said reviously mentioned members, saidclosure eing peripheral movable rotatively to engage. its members on thecontainer side 0 sald closure engaging members, and cooperating ex-.teriorly located contiguous surfaces provided with a weld closing thejoint in a fluid-tight manner, the said annularl arranged membersrelieving the weld 0 any thrust exerted. by pressure within the con--tainer.

HOWARD J. KERR. GEORGE D. EBBETS.

